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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: Alternative IDHT, 6.3V, low gain triode as a driver posted by Johno on January 30, 2016 at 14:08:53:
"Chip I once tried a 2 stage amp using 6C45pi driving DHT but found the sound brash to my ears...go figure !"Types like the 6C45П (6s45p) and 5842 were intended to be used as grounded grid RF amplifiers. When wired common cathode, extraordinary measures must be taken to suppress parasitic oscillation that can occur at frequencies beyond many an o'scope's range. Harsh sound in high gm types is frequently associated with UHF and beyond parasitic oscillation.
I and some folks I know say, only partially in jest, that these tubes will oscillate inside the cardboard box.
BTW, even the less exotic 6922 can be plagued by this "disease".
Eli D.
Edits: 01/30/16
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- RE: Alternative IDHT, 6.3V, low gain triode as a driver - Eli Duttman 16:45:41 01/30/16 (0)
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